Migi and Dali have been fully accepted as members of the Sonoyama family.
They behave just like real parent and child, but the twins notice that Mom and Dad are acting somewhat distant.
Suspecting that the Sonoyama couple might be hiding something, the two discreetly begin to search the house and stumble upon an unexpected secret of the couple.

Migi and Dali are shocked, wondering if they have been deceived. However, determined not to let things end this way, they execute a plan to retaliate against the Sonoyamas.
Guess he put out two days' worth.
.أظن أنه يضع ما سيلبس في يومين
Muss wohl für zwei Tage sein.
Debió sacar para dos días.
Ha debido sacar para dos días.
L’équivalent de deux jours.
Si sarà cambiato.
Ele deixou as roupas de dois dias, então...
За два дня, что ли?